Hello again,
Sorry for the delay on follow up, because I've been busy.
In the same day I was able to extract the graphics driver from the original installation and installed on the windows 8 OS.
I am sorry, maybe is my English, but I don't want the Windows 8 drivers, I want the original drivers and software available on support page. I cannot understand that an international company like Toshiba is selling a new product but no drivers CD included and no reference for the new product on the support page, a good and fast support is essential on modern global business.
Nvidia auto detect feature on Nvidia driver download page now correctly identifies GTX 670M but says that the graphic card as specially tailored by the notebook manufacturer and the driver should be downloaded from the manufacturer download site.
Other open question is the possibility to choose RAID on BIOS since the chipset as able to do it, and to be able to accelerate drive access with Intel Smart Response technology (use a SSD disk to speed access to the main disk), or to configure 2 SSD drives in stripe (RAID 0). Sorry but the mumentos XT hybrid is a good disk but lacks the kind of performance this machine can deliver.
So now all devices are correctly identified on device manager, the only thing I miss at the moment is the software for the special keys on the keyboard and some of the software originally installed for the Blu-ray, because I really don't want the huge amount of software that came with the original windows 7 home on my start up.
The Qosmio X870 is lighting fast with Windows 8 on a really old Intel SSD, can't wait to try 2 SSD new generation on RAID 0 (maybe one day), here is Windows performance index
Processor: 7,8
Memory (RAM): 8,8
Graphics: 5,8
Gaming Graphics: 6,5
Primary hard disk: 7,8
The low 5,8 on windows aero is because Nvidia GTX 670M don't kicks in till the 3D tests, the original disk scored 5,6 so even if this is not an last generation SSD 7,8 is a huge difference.
Waiting for the original drivers and software on the support site......
Regards